Ship&#39;s rudder



March 10. 1925. 1,529,208 7 M. OERTZ SHIPS RUDDER Filed Aug. 1, 1924 in front.

conformingv as closely as possible to the. shape of the supporting plane of aflying Patented Mar. 10, 1925.

MAX OERTZ, OF HAMBURG, GERMANY,

SHIP S RUDDER.

Application filed August 1, 1924. Serial No. 729,606: v

To all whom it may concern.

Be it known that I, Dr. lng. MAX OnR'rz, engineer, a citizen of the German State, 84

An der Alster, Hamburg, Germany, have invented certain new and useful Improvements in Ships Rudders, of which the following is a specification.

The new rudder-for ships is in two" parts. It consists of a rigid leading body, and of a rudder body arranged in the rear hollow thereof, broadened and sharply diverging The two together have a shape machine, particularly when the rudder is alzl'ranged at a distance from the hull of the s 1p. I

The invention is based upon the relationship between the lengths of the two parts of the rudder and-upon the correct utilization thereby attainable of the supportingplane form for the purpose of the most favourable steering efiect with the smallest possible expenditure of power.

The broadened leading body overlapping the rudder body in front is comparatively short in the longitudinal direction of the ship. The movable rudder body is longer, lVhen arranging the two-part, rudderata distance from the hull of the ship the articulation between the two lies somewhere about the position of maximum convexity. The length of the leading 'body is to the length of the rudder body about as 1:2.

The new cutwa-ter-shaped rudder produces an effect immediately in consequence of this construction, even in the case of the smallest rudder position. In any position of the rudder the augmented convexity of the rudder at the pivot position is always located in such a way as is most favourable for the steering efi'ect.

The new rudder is illustrated in the ac companying drawings, I

In-Figure 1 in cross section, with a slight rudder position shown dotted. Q

Figure 2 shows by way of example how the invention can easily be constructed in sheet iron.

To the stationary .headpieoe a, which is at the same time the rudder port and the leading body for the rudder the rear rudder body 0 is pivoted about the axis b. The head piece consists according to Figure 2 of a sufficiently strong iron plate parabolic in section, the openpart of which is closed and rendered fluidtight by a sunk wall. The rearwardly extending projections 'of the wall of the leading body overlap the for ward convex part of the rudder body 0, which is likewise made out of sufiiciently strong sheet iron and closed. 4

What I claiin is g i 1. A ships rudder consisting of a rigid leadingflmember spaced from' the body of the ship and having a convex front and a hollow at the rear, a rudder body longer thanthe leading member, having a convex" and relatively broad front and tapering to a point at the rear, rotatably arranged in said hollow and articulated to said leading member, the side walls of the hollow of said leading member overlapping. infront of said rudder body.

2. A ships rudder consisting of a rigid leading member parabolic in cross-section arranged at a'distance from the main body of the ship, said leading member including a rear wall arranged forwardly of. the rear edges of the parabolic portions to provide a hollow, and. a tapering rudder body pivoted tosaid leading member and having a convex front edge partially lying within the hollow of the leading member, said leading member and said rudder body having a substantially continuous and uninterrupted external surface.

3. A ships rudder as claimed in claim 1 characterized in that the leading member and rotor body present a substantially continuous and uninterrupted external surface.

In testimony whereof I aflix my signature in presence of two witnesses.

DR. ING. MAX OERTZJ Witnesses: a

N. KASPAUH, E. Herr. 

